# 4th Grade Multiplication of Whole Numbers ### Multiplication of Whole Numbers

This unit is about multiplication of whole numbers. Students will learn strategies using properties of multiplication, arrays and area models as well as the standard algorithm. They will represent and solve multi-step problems using strip diagrams and equations. They will also practice rounding skills.  I see you~

• SACRIFICING your time with your family and friends to ensure success for ALL of OUR Children. ### I see you~

• struggling each week to write lesson plans that meet the rigor of the TEKS.
• searching endlessly for resources that will help kids learn math while being challenged and engaged.
• staying late everyday after school working on plans and creating everything from scratch.

You are exhausted from working with students all day,
and still have to prep, write and create.

### Days 1-5

Day 1: I will use partial products to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number with area models and arrays.

The unit starts with building on what kids know- area models and arrays!  Students build the number with base 10 blocks to see what is going on!  You won't have to use a "magic zero" trick, because kids will understand what is happening!

Follow this with a scavenger hunt to get them up and moving!

Day 2: I will use properties of multiplication to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number using equations.

Properties:

• Associative Property
• Commutative Property
• Distributive Property

Active Engage: Mirror

Day 3: I will use the standard algorithm to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number using perfect squares through 15 by 15.

Using the distributive property to help kids understand the standard algorithm and sets them up for real math!  NO TRICKS!

Day 4: I will use the standard algorithm to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number using perfect squares through 15 by 15.

This is one of my favorite activities- Partner AB.

Kids solve different problems that have the same answer!  If they are correct , the answers match.  BUT if they do not match- Error Analysis!  Students talk about the math and learn from each other!

Day 5: I will represent and solve multi-step problems involving multiplication with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity.

The strip diagram.  I absolutely love this visual representation.  Kids can see what is happening in a model.  It tells a story.  When you are finished teaching the lesson, students practice matching the model to the equation and answer with puzzles!    ### Days 6-8

Day 6: I will represent and solve multi-step problems involving multiplication with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity.

Students love this game!  Ghost in the Graveyard has an element of risk and an urgency to solve as many problems as you can!

Day 7 & 8: I will round to the nearest 10, 100, or 1,000 and use compatible numbers to estimate solutions involving whole numbers.

Finish the unit off with a fun game of SCOOT!  